Question

pls answer my all questions

Problem 1. A number of bacteria are placed in a glass. One second later each
bacterium divides in two, the next second each of the resulting bacteria divides
in two again, et cetera. After one minute the glass is full. When was the glass
half-full?
Problem 2. Ann, John, and Alex took a bus tour of Disneyland. Each of them
must pay 5 plastic chips for the ride, but they have only plastic coins of values 10,
15, and 20 chips (each has an unlimited number of each type of coin). How can
they pay for the ride?
Problem 3. Jack tore out several successive pages from a book. The number of
the first page he tore out was 183, and it is known that the number of the last page
is written with the same digits in some order. How many pages did Jack tear out
of the book?
Problem 4. There are 24 pounds of nails in a sack. Can you measure out 9 pounds
of nails using only a balance with two pajus? (See Figure 1.)​

Answer 1

Answer:

Step-by-step explanation:

Problem 1. A number of bacteria are placed in a glass. One second later each

bacterium divides in two, the next second each of the resulting bacteria divides

in two again, et cetera. After one minute the glass is full.

every second bacteria get doubled so 1 sec before bateria were half so glass was half filled.

1 sec before 1 min = 59 secs

at 59 sec the glass was half-full

person with 15 will pay for all

person with 20 will give him 1 and get back 1 of 15

person with 10 will give him 2 of 10 and get back 1 of 5

this way all will pay 5 each

a page has two sides

it should end with even number

318 is only possibility

183 to 318

318-183 +1 = 136

number of pages 136/2 = 68

68 pages torn

for last question figure is missing